Hi all,
This is my first post on these forums so please excuse me if I miss any important information.
Our boiler (Glow-Worm Fuelsaver MKII) has been like this since we moved into our house back in October and I think its getting to the stage now where we need to finally find a fix or get it replaced.
As far as I am aware the boiler is approximately 25 years old so will need replacing eventually anyways.
If I just put the boiler on for the hot water it will stay on for approximately 2 minutes, overheat and then stay off for quite a few minutes until it is cool enough to come back on.
If I put it on for the central heating it can come on for anything up to 15 minutes before overheating and cutting off.
Over the winter months this wasnt too bad as if we had the heating and hot water on together the boiler would stay on long enough to heat up both.
Although the boiler is better when the central heating is on I wouldnt say the radiators ever got that hot (the house rarely would get up to 22 or 23c even if the heating had been on for hours. Also, the hot water was only mildly hot (you could comfortably run the hot tap over your hand (although without the heating on the hot water only gets warm).
I have tried draining the system, bleeding the radiators, running some descaler for a few weeks and then draining the system but nothing has improved. Oh I also changed the thermostat on the boiler but it turns out the old one was working fine.
I have had one plumber look at it and he was unable to diagnose the problem, his only suggestion was the heat exchanger may be scaled up?
I'm open to trying anything as we have a few months before we will really need a replacement. At the moment we aren't using the boiler, instead we're just using the immersion tank for half hour a night - its nice to have HOT water again
Thanks in advance for any replies, please let me know if I can provide further details.
Many thanks,
Darren
This is my first post on these forums so please excuse me if I miss any important information.
Our boiler (Glow-Worm Fuelsaver MKII) has been like this since we moved into our house back in October and I think its getting to the stage now where we need to finally find a fix or get it replaced.
As far as I am aware the boiler is approximately 25 years old so will need replacing eventually anyways.
If I just put the boiler on for the hot water it will stay on for approximately 2 minutes, overheat and then stay off for quite a few minutes until it is cool enough to come back on.
If I put it on for the central heating it can come on for anything up to 15 minutes before overheating and cutting off.
Over the winter months this wasnt too bad as if we had the heating and hot water on together the boiler would stay on long enough to heat up both.
Although the boiler is better when the central heating is on I wouldnt say the radiators ever got that hot (the house rarely would get up to 22 or 23c even if the heating had been on for hours. Also, the hot water was only mildly hot (you could comfortably run the hot tap over your hand (although without the heating on the hot water only gets warm).
I have tried draining the system, bleeding the radiators, running some descaler for a few weeks and then draining the system but nothing has improved. Oh I also changed the thermostat on the boiler but it turns out the old one was working fine.
I have had one plumber look at it and he was unable to diagnose the problem, his only suggestion was the heat exchanger may be scaled up?
I'm open to trying anything as we have a few months before we will really need a replacement. At the moment we aren't using the boiler, instead we're just using the immersion tank for half hour a night - its nice to have HOT water again
Thanks in advance for any replies, please let me know if I can provide further details.
Many thanks,
Darren